I always carry an SMB, and on one of the first dives of every trip I let the DM know that I will be deploying mine at the end of the dive and it doesn't mean that I am having trouble. One thing that I have learned is not to wait until I have ascended to 15' to deploy it; it's hard for me not to drift shallower during the deployment. I deploy it at 25-30' and then wind up the spool as I ascend to SS depth. I like to be a little negative on the SS so I can hang from the SMB like a subway rider. In addition to making it easier to maintain SS depth, it pulls the SMB vertical so it's easier to see.